From mboxrd@z Thu Jan  1 00:00:00 1970
From: Simon Glass <sjg@chromium.org>
Date: Tue, 28 Jul 2020 13:01:23 -0600
Subject: [PATCH v1 01/24] fdtdec: Add API to read pci bus-range property
In-Reply-To: <20200724100856.1482324-2-sr@denx.de>
References: <20200724100856.1482324-1-sr@denx.de>
 <20200724100856.1482324-2-sr@denx.de>
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On Fri, 24 Jul 2020 at 04:09, Stefan Roese <sr@denx.de> wrote:
>
> From: Suneel Garapati <sgarapati@marvell.com>
>
> Add fdtdec_get_pci_bus_range to read bus-range property
> values.
>
> Signed-off-by: Suneel Garapati <sgarapati@marvell.com>
> Cc: Simon Glass <sjg@chromium.org>
>
> Signed-off-by: Stefan Roese <sr@denx.de>
> ---
>
> Changes in v1:
> - Added return value description to function prototype in header
> - Changed from using be32_to_cpup() to fdt32_to_cpu()
>
>  include/fdtdec.h | 13 +++++++++++++
>  lib/fdtdec.c     | 16 ++++++++++++++++
>  2 files changed, 29 insertions(+)

Reviewed-by: Simon Glass <sjg@chromium.org>

Is the address always 32-bit?


>
> diff --git a/include/fdtdec.h b/include/fdtdec.h
> index 760b392bdf..f6759c7f8e 100644
> --- a/include/fdtdec.h
> +++ b/include/fdtdec.h
> @@ -444,6 +444,19 @@ int fdtdec_get_pci_vendev(const void *blob, int node,
>  int fdtdec_get_pci_bar32(const struct udevice *dev, struct fdt_pci_addr *addr,
>                          u32 *bar);
>
> +/**
> + * Look at the bus range property of a device node and return the pci bus
> + * range for this node.
> + * The property must hold one fdt_pci_addr with a length.
> + * @param blob         FDT blob
> + * @param node         node to examine
> + * @param res          the resource structure to return the bus range
> + * @return 0 if ok, negative on error
> + */
> +
> +int fdtdec_get_pci_bus_range(const void *blob, int node,
> +                            struct fdt_resource *res);
> +
>  /**
>   * Look up a 32-bit integer property in a node and return it. The property
>   * must have at least 4 bytes of data. The value of the first cell is
> diff --git a/lib/fdtdec.c b/lib/fdtdec.c
> index 78576b530f..0b40fa374a 100644
> --- a/lib/fdtdec.c
> +++ b/lib/fdtdec.c
> @@ -242,6 +242,22 @@ int fdtdec_get_pci_bar32(const struct udevice *dev, struct fdt_pci_addr *addr,
>
>         return 0;
>  }
> +
> +int fdtdec_get_pci_bus_range(const void *blob, int node,
> +                            struct fdt_resource *res)
> +{
> +       const u32 *values;
> +       int len;
> +
> +       values = fdt_getprop(blob, node, "bus-range", &len);
> +       if (!values || len < sizeof(*values) * 2)
> +               return -EINVAL;
> +
> +       res->start = fdt32_to_cpu(*values++);
> +       res->end = fdt32_to_cpu(*values);
> +
> +       return 0;
> +}
>  #endif
>
>  uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
> --
> 2.27.0
>